Uitableview scroll to last row swift 4

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. In your case, the view controller is a not a table view controller but a subclass of a UIViewController. It also has an outlet that is connected to the table view, but it is not called tableView but menuTable.

Then of course you have to call.

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The strange error messages are caused by the fact that self. Using Swift 2. Keep in mind that if you call this method from an external class for example, you dont know when tableView has finished its loading, so what's the possibilities?

iOS - UITableView Does Not Scroll To Last Row In Data Source

Step two : check when the table finish its loading and launch an "end operations" method:. Note that if you have func tableViewSelectionDidChange Learn more.

uitableview scroll to last row swift 4

Asked 4 years, 9 months ago. Active 11 months ago. Viewed 57k times. Middle self. Mikee Mikee 1 1 gold badge 6 6 silver badges 8 8 bronze badges. Nope, the second line compiles just fine. Did you define a tableView property in the view controller and connect it to the table view in the IB?

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Could this be a duplicate of stackoverflow. My VC has a main container in it which reacts to selections in the tableView. That displays the menu items correctly, but then I have a problem with changing what the main container shows based on the selection in the menu. Mikee: If your the table view property is called "menuTable" then you should call it as self.

Getting Started With UITableView in Swift

MartinR Awesome that worked! So simple — your help is much appreciated! Do you care to put your comment as an answer so I can credit you with the right answer? Active Oldest Votes. The statement self.

uitableview scroll to last row swift 4

Middle assumes that tableView is a property of the view controller, connected to a table view in the Storyboard. Then of course you have to call self.

Middle to select a row of that table view. Martin R Martin R k 70 70 gold badges silver badges bronze badges. Swift 3: self.In this swift tutorial, you are going to learn how to build a custom UITableView programmatically using Swift 4. Along the way, I am going to be showing you how to create a custom UITableViewCell programmatically from scratch as well. If you are new to building programmatic UI in Xcode, take a look at this article which covers how to create a simple login screen programmatically.

Then, choose a single view application and name it contactsapp and leave all other settings as is. Once the project is created, download the asset files in here and unzip it, then drag them into the Assets.

Xcassets file. Storyboard is not needed for this project. If you want to keep the Main. In that case, you can skip the next two sections and jump right into Step 4: Create a Data Model. At this stage, the Xcode does not have an entry point, meaning the project does not have a root view controller that it points to, which will normally appear first followed by the splash screen when you run the app. However, doing it manually will help you to understand the steps involved in the same process.

When adding the root view controller manually, Xcode will set its background colour to black by default. I am going to create two files as part of the model for our app, which are Contact. Go ahead and create the contact. This file contains a simple Contact Struct that will have a few properties in it based on the final table view cell image below.

I will be setting the profile image reference names to the same as names so that I do not have to create a property for the profile image. In real-world applications, all the API calls code would go there. Create a static method called getContacts inside the ContactAPI class which is responsible to get all of the contacts data. Create a property called contacts and assign the value, which would be an array of contact objects, by invoking getContacts method on ContactAPI, like the code below.

Note: As you can see, I use static keyword in front of the getContacts methods when declaring it so that I do not have to instantiate ContactAPI class to invoke getContacts method. Go to contactsViewController. The numberOfRowsInTableView method determines how many rows UITableViewCells it should create and display in the table view, which would be based on the length of the model array contacts. Inside this method, declare a variable called cell by invoking the dequeReusableCell on the tableView passing identifier string and indexpath.

This identifier string will be used to register this cell for contactsTableView later. Get the name property from the contact object on each iteration using indexPath.

At this point, contactsTableView does not know about this cell. Note: If you change the identifier string insidecellForRowAtIndexPath, you should come back to the code above and change it there as well. But the content of tableview is overlapping with the status bar at the top and with the horizontal bar at the bottom which are outside of the safe area.

Left and right are absolute to the screen, on the other hand, leading and training will be based on the reading direction of the text.

uitableview insert row without scrolling

Run it and you can see the content does not go beyond the non-safe areas which are highlighted with red like in the screenshot below.

Go to AppDelegate. Create a method called setUpNavigation inside contactsViewController file and invoke it inside the viewDidLoad method.Scrolling to a certain point in a table view is a common requirement.

For example, you might scroll to show new entries after loading new data or to show that a row has updated data. ActionSheet style.

To start we need a tableview to scroll. So create a new project that has a tableview that lists the integers from 0 to Now we need our Action Sheet so they can pick how they want to scroll.

UIAlertActions take a few properties: the title and style for display and a handler block to be executed when the action is selected. In our cancel action handler block we just dismiss the action sheet. Note that this action is different than scrolling to the top of the tableview.

If the tableview has a header then scrolling to the top would scroll to the top of the header.

uitableview scroll to last row swift 4

First we add a new action to the sheet after the cancel action but before calling presentViewController :. Then we need the actual scrolling code. The data in a tableview is an array of arrays: sections often only one of rows.

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So we can use an index path to describe the location of a row in a tableview. The indexes start at 0, we have only 1 section, and we want the first row so our index path is 0.

We can opt to scroll so that the row is at the top of the view, the bottom, or the middle. Scrolling to the last row is pretty similar to the first row, except we need to compute the index path.

So add the action to the action sheet:. Then compute the index path and scroll this time with the row getting positioned at the bottom of the view :. If you can compute the index path you can scroll to any row that you want to. For example, you might include a search function for your tableview that scrolls to the desired row.

You can use that method to scroll to any point in the tableview by x, y value.You probably want to know how to use such an important view?

So first, start a new Single View Application. Fill in the organization name and identifier as you normally would. If you need help with this part of the tutorial, please see the post Hello World!

Your first iOS App in Swiftwhich covers this section in much greater detail. There are basically two ways to do this step. If you understand how to do it with this version, than using a UITableViewController will be a piece of cake.

When you drag it onto your ViewController, the Table View will expand to fill it. Align it to have it centered in your ViewController. Now here, there are a few ways to do this one. The Delegate is primarily to control HOW this data is displayed.

There is a bit of overlap, and the Delegate often needs to talk to the DataSource as well, but this is what I have seen thus far as the difference between the two. Is this really the job of the ViewController?

Since the delegate has to request information from the DataSource though, I have the Delegate taking in the DataSource as an injected dependency. In short, today we will have 1 class to rule them all. Which is absolutely right. We said that it adopts the protocol, but we have not put in the required methods to actually conform to it yet. Outside of any method, create the array like so:. Also, remember setting that identifier for our prototype cell?

If you used the straight string everywhere, you would have to change it everywhere you rewrote that string.Don't bother to write the code by yourself. Why don't you use ReverseExtension.

Expandable and Collapsible Sections UITableView (Ep 3)

Its very easy and will give you all required results. Note: Whenever you need to add a new cell, please insert newly added model at zeroth index of datasource array, so new cell should add at bottom.

Otherwise it would add the cell at top and you would get confused again. I have searched a lot for a solution but all the results have not quite been a solution to what I am trying to achieve. They all suggest scrolling to the last position of a table with scrollToRowAtIndexPath and populating the data in reverse. But this doesn't work if the table content is dynamic and in some instances not all the cells have data.

For example in a normal tableView the order is:. And end up with something like this:. This solution also works with sections, section headers and section footers. Above code is untested but should work.

Just make sure that you cope for the height of any navbar or tabbar and you'll be fine. In the code above i only do that for the navbar! This solution adjust the content inset as the content size changes using KVO. It also takes the content inset into account when scrolling to top as simply scrolling to CGPointZero will scroll to the top of the content instead of scrolling to the top of the table.

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How to populate UITableView from the bottom upwards? And end up with something like this: unwanted outcome: label 3 label 2 label 1 empty empty scroll direction v V any help would be great thank you. Swift 3. How to scroll to the bottom of a UITableView on the iPhone before the view appears In a storyboard, how do I make a custom cell for use with multiple controllers?But there is And if we scroll up again, the problem will arise as well: That happens because the cell from row 1 is recycled. When sections tapped, they expand or collapse with animation Scroll.

If you dont do this, iOS will D:. One of the key features provided by MarkupKit the open-source project I mentioned in an earlier comment is the ability to easily create static table views, either in markup or in code. In iOS applications, the tableview is used in the association with the navigation controller to organize the data hierarchically. This will insert a blank line in your table view. That trick works for me without any hassles.

However, once user enters some value and clicks on SAVE, you will need to have your logic in place to retrieve the user entered values. Hope it work same for you. Yes, you read it correctly and I typed it correctly. The first method is used to inform the table view how many rows are in the section. I did it in this way: if self. Deletion of multiple rows including animation might cause crash. No mistakes have been made here. How can I fix crash when tap to select row after scrolling the tableview?

Prevent UITableView from scrolling when section header view is dragged Tag: iosuitableview I have a super-tall pt section header on a table view that shows in app purchase information.

A UITableView is for when you have a large number of model items, and want to efficiently flow them into reusable CellViews, since creating CellViews is a relatively expensive operation when you are trying to do smooth 60fps animation of scrolling. Collection views were still pretty new and there wasnt a lot written about them, so my post got pretty popular.

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G: A: If I understand your mission correctly. You can have a button to insert a new line on the page and then in the onInputProcessing you will need to append an initial line to the internal table. Obviously, in order to show different images, we need to alter this line of code. It now accounts for over a fifth of my entire blogs traffic. In this post, we will cover what you need to know to support UITableView s in your apps. The eight methods shown in Listing pertain to batch insertion and deletion.

Either you go with reloadCell technique or cell updates via beginUpdate and endUpdate.Tag: iosobjective-cuitableview.

uitableview scroll to last row swift 4

I'm working on a messaging component of an iOS application. This code works until there are about 20 or so rows. But when there are more messages, then it doesn't quite scroll all the way to the bottom. Is there some sort of limit? I'm ok with a view load delay if it means scrolling all the way to the bottom.

Eventually I will implement some sort of message loading cap, but I would like to first understand and solve this issue. This is a table view within a view controller. I'm saving sent and received Message objects in a User object's array property the person on the other end of the message conversation. The thing that doesn't make sense is that the code works perfectly for up to around 20 messages.

Beyond that, it doesn't scroll all the way, but I can still manually scroll to the bottom as expected. The rest of the cell config code is :. I've determined that this issue has to do with cell height. By increasing tableView. However, there remains an issue with when messages wrap beyond 1 line in a given cell. For each message longer than 1 line, the table scroll comes up a few more pixels short. Removing tableView. I want to say my original question is answered, but I'm still not sure how to make it scroll perfectly given the likelihood of multi-line cells.

But what I think is happening is that you need to call viewWithTag: on cell. I'd recommend creating proper IBOutlets to hold your imageview and label In initializeSettingsView add nibView. And then in viewDidload add the hight constraint to settingsView constraints. Height, relatedBy:. Equal, toItem: nil, attribute:. NotAnAttribute, multiplier: 1. Twilio developer evangelist here.

It is possible to build an iOS application to use


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